{
  "manageEntity": {
    "action": "Save",
    "entityId": "433919304",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd2f2c9d35d9609e9a8776394cf1e659e329c19549df1e63e3b828947b025f5fc",
    "signature": "0x2fb8fac74deb21a2852e96d2df70c8be5b237ef41ccae8b0ec4f226de678668611b84d5b83ad4a8bd8a4b8b68e68d6ecb03a83298081d86d036b553c6d4adcff1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}